package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 增加员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        employeeMapper.save(employeeDTO);
    }

    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        // 开始分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());

        try (Page<Employee> page = employeeMapper.page(employeePageQueryDTO)) {
            // 把page处理成PageResult对象
            long total = page.getTotal();
            List<Employee> records = page.getResult();
            return new PageResult(total, records);
        }

    }

    /**
     * 启用/禁用员工账号
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        employeeMapper.startOrStop(status, id);
    }

    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    @Override
    public EmployeeDTO queryById(Long id) {
        return employeeMapper.queryById(id);
    }

    /**
     * 编辑员工信息
     * @param employeeDTO
     */
    @Override
    public void edit(EmployeeDTO employeeDTO) {
//        employeeDTO.setUpdateTime(LocalDateTime.now());
//        employeeDTO.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.edit(employeeDTO);
    }

    /**
     * 修改密码
     * @param passwordEditDTO
     */
    @Override
    public void editPassword(PasswordEditDTO passwordEditDTO) {
        passwordEditDTO.setEmpId(BaseContext.getCurrentId());
        EmployeeDTO employeeDTO = employeeMapper.queryById(passwordEditDTO.getEmpId());
        // 先检查原密码是否正确
        String password = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());
        if (!password.equals(employeeDTO.getPassword())) {
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }
        // 然后修改密码
        password = DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes());
        employeeDTO.setPassword(password);
        // 更新数据库
        employeeMapper.edit(employeeDTO);
    }

}
